A comparison of different types of gold-carbon composite electrode for detection of arsenic(III).

Journal article

A study has been conducted using abrasively modified basal and edge-plane graphite, carbon-paste, and carbon-epoxy electrodes to create gold-carbon composite electrodes. Using either nano or micro-sized gold particles their suitability for use in detecting arsenic(III) is assessed. It was found that gold arrays prepared from micron-sized particles gave the best performance for arsenic detection. In particular micron arrays produced in carbon-paste electrodes with an easily renewable surface work well for detection of arsenic, producing a detection limit of 5(+/-2)x10(-9) mol L(-1), with a high sensitivity of 10(+/-0.1) A mol(-1) L.

Authors: Simm, A; Banks, C; Wilkins, S; Karousos, N; Davis, J

• Publication status: Published
• Journal: Analytical and bioanalytical chemistry
• Volume: 381
• Issue: 4
• Pages: 979-985
• Publication date: 2005-02-01
• DOI: 10.1007/s00216-004-2960-z
• EISSN: 1618-2650
• ISSN: 1618-2642
• Language: English
• Keywords: anodic stripping voltammetry; gold nanoarrays; arsenic(III); gold microarrays; carbon-paste electrodes